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<a class="jxr_linenumber" name="1" href="#1">1</a>   <em class="jxr_comment">/*</em>
<a class="jxr_linenumber" name="2" href="#2">2</a>   <em class="jxr_comment"> * Copyright 2012 The Netty Project</em>
<a class="jxr_linenumber" name="3" href="#3">3</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="4" href="#4">4</a>   <em class="jxr_comment"> * The Netty Project licenses this file to you under the Apache License,</em>
<a class="jxr_linenumber" name="5" href="#5">5</a>   <em class="jxr_comment"> * version 2.0 (the "License"); you may not use this file except in compliance</em>
<a class="jxr_linenumber" name="6" href="#6">6</a>   <em class="jxr_comment"> * with the License. You may obtain a copy of the License at:</em>
<a class="jxr_linenumber" name="7" href="#7">7</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="8" href="#8">8</a>   <em class="jxr_comment"> *   <a href="http://www.apache.org/licenses/LICENSE-2.0" target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.0</a></em>
<a class="jxr_linenumber" name="9" href="#9">9</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="10" href="#10">10</a>  <em class="jxr_comment"> * Unless required by applicable law or agreed to in writing, software</em>
<a class="jxr_linenumber" name="11" href="#11">11</a>  <em class="jxr_comment"> * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT</em>
<a class="jxr_linenumber" name="12" href="#12">12</a>  <em class="jxr_comment"> * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the</em>
<a class="jxr_linenumber" name="13" href="#13">13</a>  <em class="jxr_comment"> * License for the specific language governing permissions and limitations</em>
<a class="jxr_linenumber" name="14" href="#14">14</a>  <em class="jxr_comment"> * under the License.</em>
<a class="jxr_linenumber" name="15" href="#15">15</a>  <em class="jxr_comment"> */</em>
<a class="jxr_linenumber" name="16" href="#16">16</a>  <strong class="jxr_keyword">package</strong> org.jboss.netty.handler.execution;
<a class="jxr_linenumber" name="17" href="#17">17</a>  
<a class="jxr_linenumber" name="18" href="#18">18</a>  
<a class="jxr_linenumber" name="19" href="#19">19</a>  <strong class="jxr_keyword">import</strong> java.util.concurrent.Executor;
<a class="jxr_linenumber" name="20" href="#20">20</a>  <strong class="jxr_keyword">import</strong> java.util.concurrent.ExecutorService;
<a class="jxr_linenumber" name="21" href="#21">21</a>  
<a class="jxr_linenumber" name="22" href="#22">22</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.util.ExternalResourceReleasable;
<a class="jxr_linenumber" name="23" href="#23">23</a>  
<a class="jxr_linenumber" name="24" href="#24">24</a>  <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="25" href="#25">25</a>  <em class="jxr_javadoccomment"> * A special {@link Executor} which allows to chain a series of</em>
<a class="jxr_linenumber" name="26" href="#26">26</a>  <em class="jxr_javadoccomment"> * {@link Executor}s and {@link ChannelEventRunnableFilter}.</em>
<a class="jxr_linenumber" name="27" href="#27">27</a>  <em class="jxr_javadoccomment"> */</em>
<a class="jxr_linenumber" name="28" href="#28">28</a>  <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../org/jboss/netty/handler/execution/ChainedExecutor.html">ChainedExecutor</a> <strong class="jxr_keyword">implements</strong> Executor, <a href="../../../../../org/jboss/netty/util/ExternalResourceReleasable.html">ExternalResourceReleasable</a> {
<a class="jxr_linenumber" name="29" href="#29">29</a>  
<a class="jxr_linenumber" name="30" href="#30">30</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> Executor cur;
<a class="jxr_linenumber" name="31" href="#31">31</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> Executor next;
<a class="jxr_linenumber" name="32" href="#32">32</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../../org/jboss/netty/handler/execution/ChannelEventRunnableFilter.html">ChannelEventRunnableFilter</a> filter;
<a class="jxr_linenumber" name="33" href="#33">33</a>  
<a class="jxr_linenumber" name="34" href="#34">34</a>      <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="35" href="#35">35</a>  <em class="jxr_javadoccomment">     * Create a new {@link ChainedExecutor} which will used the given</em>
<a class="jxr_linenumber" name="36" href="#36">36</a>  <em class="jxr_javadoccomment">     * {@link ChannelEventRunnableFilter} to see if the {@link #cur} {@link Executor} should get</em>
<a class="jxr_linenumber" name="37" href="#37">37</a>  <em class="jxr_javadoccomment">     * used.  Otherwise it will pass the work to the {@link #next} {@link Executor}</em>
<a class="jxr_linenumber" name="38" href="#38">38</a>  <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="39" href="#39">39</a>  <em class="jxr_javadoccomment">     * @param filter  the {@link ChannelEventRunnableFilter} which will be used to check if the</em>
<a class="jxr_linenumber" name="40" href="#40">40</a>  <em class="jxr_javadoccomment">     *                {@link ChannelEventRunnable} should be passed to the cur or next {@link Executor}</em>
<a class="jxr_linenumber" name="41" href="#41">41</a>  <em class="jxr_javadoccomment">     * @param cur     the {@link Executor} to use if the {@link ChannelEventRunnableFilter} match</em>
<a class="jxr_linenumber" name="42" href="#42">42</a>  <em class="jxr_javadoccomment">     * @param next    the {@link Executor} to use if the {@link ChannelEventRunnableFilter} does not match</em>
<a class="jxr_linenumber" name="43" href="#43">43</a>  <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="44" href="#44">44</a>      <strong class="jxr_keyword">public</strong> <a href="../../../../../org/jboss/netty/handler/execution/ChainedExecutor.html">ChainedExecutor</a>(<a href="../../../../../org/jboss/netty/handler/execution/ChannelEventRunnableFilter.html">ChannelEventRunnableFilter</a> filter, Executor cur, Executor next) {
<a class="jxr_linenumber" name="45" href="#45">45</a>          <strong class="jxr_keyword">if</strong> (filter == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="46" href="#46">46</a>              <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> NullPointerException(<span class="jxr_string">"filter"</span>);
<a class="jxr_linenumber" name="47" href="#47">47</a>          }
<a class="jxr_linenumber" name="48" href="#48">48</a>          <strong class="jxr_keyword">if</strong> (cur == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="49" href="#49">49</a>              <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> NullPointerException(<span class="jxr_string">"cur"</span>);
<a class="jxr_linenumber" name="50" href="#50">50</a>          }
<a class="jxr_linenumber" name="51" href="#51">51</a>          <strong class="jxr_keyword">if</strong> (next == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="52" href="#52">52</a>              <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> NullPointerException(<span class="jxr_string">"next"</span>);
<a class="jxr_linenumber" name="53" href="#53">53</a>          }
<a class="jxr_linenumber" name="54" href="#54">54</a>  
<a class="jxr_linenumber" name="55" href="#55">55</a>          <strong class="jxr_keyword">this</strong>.filter = filter;
<a class="jxr_linenumber" name="56" href="#56">56</a>          <strong class="jxr_keyword">this</strong>.cur = cur;
<a class="jxr_linenumber" name="57" href="#57">57</a>          <strong class="jxr_keyword">this</strong>.next = next;
<a class="jxr_linenumber" name="58" href="#58">58</a>      }
<a class="jxr_linenumber" name="59" href="#59">59</a>  
<a class="jxr_linenumber" name="60" href="#60">60</a>      <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="61" href="#61">61</a>  <em class="jxr_javadoccomment">     * Execute the passed {@link ChannelEventRunnable} with the current {@link Executor} if the</em>
<a class="jxr_linenumber" name="62" href="#62">62</a>  <em class="jxr_javadoccomment">     * {@link ChannelEventRunnableFilter} match.  Otherwise pass it to the next {@link Executor} in</em>
<a class="jxr_linenumber" name="63" href="#63">63</a>  <em class="jxr_javadoccomment">     * the chain.</em>
<a class="jxr_linenumber" name="64" href="#64">64</a>  <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="65" href="#65">65</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> execute(Runnable command) {
<a class="jxr_linenumber" name="66" href="#66">66</a>          assert command instanceof ChannelEventRunnable;
<a class="jxr_linenumber" name="67" href="#67">67</a>          <strong class="jxr_keyword">if</strong> (filter.filter((ChannelEventRunnable) command)) {
<a class="jxr_linenumber" name="68" href="#68">68</a>              cur.execute(command);
<a class="jxr_linenumber" name="69" href="#69">69</a>          } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="70" href="#70">70</a>              next.execute(command);
<a class="jxr_linenumber" name="71" href="#71">71</a>          }
<a class="jxr_linenumber" name="72" href="#72">72</a>      }
<a class="jxr_linenumber" name="73" href="#73">73</a>  
<a class="jxr_linenumber" name="74" href="#74">74</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> releaseExternalResources() {
<a class="jxr_linenumber" name="75" href="#75">75</a>          <strong class="jxr_keyword">if</strong> (cur instanceof ExecutorService) {
<a class="jxr_linenumber" name="76" href="#76">76</a>              ((ExecutorService) cur).shutdown();
<a class="jxr_linenumber" name="77" href="#77">77</a>          }
<a class="jxr_linenumber" name="78" href="#78">78</a>          <strong class="jxr_keyword">if</strong> (next instanceof ExecutorService) {
<a class="jxr_linenumber" name="79" href="#79">79</a>              ((ExecutorService) next).shutdown();
<a class="jxr_linenumber" name="80" href="#80">80</a>          }
<a class="jxr_linenumber" name="81" href="#81">81</a>          releaseExternal(cur);
<a class="jxr_linenumber" name="82" href="#82">82</a>          releaseExternal(next);
<a class="jxr_linenumber" name="83" href="#83">83</a>      }
<a class="jxr_linenumber" name="84" href="#84">84</a>  
<a class="jxr_linenumber" name="85" href="#85">85</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">void</strong> releaseExternal(Executor executor) {
<a class="jxr_linenumber" name="86" href="#86">86</a>          <strong class="jxr_keyword">if</strong> (executor instanceof ExternalResourceReleasable) {
<a class="jxr_linenumber" name="87" href="#87">87</a>              ((<a href="../../../../../org/jboss/netty/util/ExternalResourceReleasable.html">ExternalResourceReleasable</a>) executor).releaseExternalResources();
<a class="jxr_linenumber" name="88" href="#88">88</a>          }
<a class="jxr_linenumber" name="89" href="#89">89</a>      }
<a class="jxr_linenumber" name="90" href="#90">90</a>  }
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